When introducing a major change, such as large upgrades, installations, new applications, application updates, or service packs, it is recommended that you first test the change on a subset desktop or application assignment. Create a copy of your image so that if the changes cause problems, you can return to the original.

Duplicate an image in the Horizon Cloud Service Administration Console. Then apply the service pack, upgrade, or other major change to the copy. If problems occur, you can duplicate the original image again. If the change is successful, you can apply the changes to your primary production assignments.